Question # 1

The disaccharide present in milk is

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Sucrose

Maltose

Lactose

Cellobiose

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

The symbol of the element whose atoms have the outer most electronic configuration 2s² 2p³ is

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N

Li

P

Na

Which of the following cannot be produced by acidic dehydration of alcohols?

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Ethers

Aldehyde

Alkyl Hydrogen sulphate

Alkene

The IUPAC name of the compound having the formula (CH3) 3 C - CH = CH2 is

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1, 1 -Dimethyl-3-butene

1,1,1-Trimethyl-3-propene

3,3,-Dimethyl-1-butene

3,3,3-Trimethyl-1-propene

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

The ratio of close packed atoms to tetrahedral holes in cubic close packing is

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1 : 1

1 : 2

1 : 3

2 : 1

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

On heating acetaldehyde with ammonical silver nitrate solution we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Water (H2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphur has high electronegativity than oxygen

Water molecules associate through hydrogen bonding.

The percentage of nitrogen in urea is

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46

60

70

80

Which of the following fluorides does not exist?

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NF₅

PF₅

AsF₅

SbF₅

The bond angle H-O-H in ice is closest to

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120° . 28'

60°

90°

109°

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

The order of reactivity of halogens in aliphatic substitution reactions is

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Br2 > C12 > F2

Cl2 > Br2 > F2

Cl2 C12 > Br2

F2 > Br2 > C12

If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

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800mL

200mL

10mL

Zero

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

The halide which is not hydrolysed is

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SiCl₄

SiF₄

CCl₄

PbCl₄

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